Commit 44ec5aa3 authored by Michael J. Ruhl's avatar Michael J. Ruhl Committed by Jason Gunthorpe
Browse files

IB/hfi1: List all receive contexts from debugfs 

The current debugfs output for receive contexts (rcds), stops after the
kernel receive contexts have been displayed.  This is not enough
information to fully diagnose packet drops.

Display all of the receive contexts.

Augment the output with some more context information.

Limit the ring buffer header output to 5 entries to avoid overextending
the sequential file output.

Fixes: bf808b50 ("IB/hfi1: Add kernel receive context info to debugfs")
Link: https://lore.kernel.org/r/20191219211928.58387.20737.stgit@awfm-01.aw.intel.com


Reviewed-by: default avatarMike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: default avatarMichael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: default avatarKaike Wan <kaike.wan@intel.com>
Signed-off-by: default avatarDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
parent 2fb3b5ae

drivers/infiniband/hw/hfi1/debugfs.c

+1 −1
Original line number Diff line number Diff line
@@ -379,7 +379,7 @@ static void *_rcds_seq_next(struct seq_file *s, void *v, loff_t *pos) 
	struct hfi1_devdata *dd = dd_from_dev(ibd);



	++*pos;

	if (!dd->rcd || *pos >= dd->n_krcv_queues)

	if (!dd->rcd || *pos >= dd->num_rcv_contexts)

		return NULL;

	return pos;

}

drivers/infiniband/hw/hfi1/driver.c

+9 −3
Original line number Diff line number Diff line
@@ -1726,23 +1726,29 @@ static int process_receive_invalid(struct hfi1_packet *packet) 
	return RHF_RCV_CONTINUE;

}



#define HFI1_RCVHDR_DUMP_MAX	5



void seqfile_dump_rcd(struct seq_file *s, struct hfi1_ctxtdata *rcd)

{

	struct hfi1_packet packet;

	struct ps_mdata mdata;

	int i;



	seq_printf(s, "Rcd %u: RcvHdr cnt %u entsize %u %s head %llu tail %llu\n",

	seq_printf(s, "Rcd %u: RcvHdr cnt %u entsize %u %s ctrl 0x%08llx status 0x%08llx, head %llu tail %llu  sw head %u\n",

		   rcd->ctxt, get_hdrq_cnt(rcd), get_hdrqentsize(rcd),

		   get_dma_rtail_setting(rcd) ?

		   "dma_rtail" : "nodma_rtail",

		   read_kctxt_csr(rcd->dd, rcd->ctxt, RCV_CTXT_CTRL),

		   read_kctxt_csr(rcd->dd, rcd->ctxt, RCV_CTXT_STATUS),

		   read_uctxt_csr(rcd->dd, rcd->ctxt, RCV_HDR_HEAD) &

		   RCV_HDR_HEAD_HEAD_MASK,

		   read_uctxt_csr(rcd->dd, rcd->ctxt, RCV_HDR_TAIL));

		   read_uctxt_csr(rcd->dd, rcd->ctxt, RCV_HDR_TAIL),

		   rcd->head);



	init_packet(rcd, &packet);

	init_ps_mdata(&mdata, &packet);



	while (1) {

	for (i = 0; i < HFI1_RCVHDR_DUMP_MAX; i++) {

		__le32 *rhf_addr = (__le32 *)rcd->rcvhdrq + mdata.ps_head +

					 rcd->rhf_offset;

		struct ib_header *hdr;